The location of some system configuration and system administrator executable files, is: A. /home B. /proc C. /var D. /sbin E. None of the above

The correct answer is D. /sbin.

/sbin is a system directory on Linux and Unix-like operating systems that contains system administration executable files. These files are used to manage the system, such as starting and stopping services, configuring the system, and managing users and groups.

/home is a directory that contains the home directories of users.
/proc is a directory that contains information about the running processes on the system.
/var is a directory that contains variable data, such as log files, mail spools, and web server content.
E is not a valid option.